商品

車型

CAST-I-CYLINDER KIT Ø 61 VESPA COSA - PX125-150

3117181

商品說明

Constantly refined over the years, the legendary cast-iron cylinder kits for Vespa have now a new code, after undergoing further upgrade concerning above all the main and rear transfer ports, the exhaust port and intake port, this latter considerably increased in its dimensions.

It is the one and only cylinder kit of its kind using an o-ring as sealing gasket between head and cylinder, in order to guarantee better sealing and heat dissipation.

By improving torque at low RPMs, this cylinder kit further increases performance.

The head has been heavily revised, starting from the cooling fins, which are now curved and more winding, exposing a greater surface area to the air and maximising the cooling effect. The head fins have also been inserted into the cavity between the head and the cylinder to create significant air flow, capable of further improving operating temperature. The result is pleasing to the eye for its unique and original shape thanks to the precise positioning of the fins, the design of which only stops when absolutely necessary, at the holes for inserting the fixing screws.

The very structure of the head has been revised, increasing the mass to obtain record rigidity, bringing together lightness with maximum possible cooling fin length, and making most use of space freed by the conveyor. The inside of the head is hemispherical and is worked with digitally controlled machines. The position of the spark plug is noticeably inclined, even though remaining in the centre.

The kit contains two centring bushes to guarantee perfect coupling between the head and the cylinder, only separated by an O-ring. This solution, which comes straight from the world of competition racing, guarantees maximum hold and maximum possible heat exchange, eliminating almost all kinds of seal and so removing all barriers between the head and the cylinder.

With this development Malossi technicians went beyond all expectations once again!

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